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Topic: GSXR Carbs (Read 8714 times)

Have any of the 1200 owner ever swapped your carbs over to the 40mm carbs that came on mid 90's gsxr 1100 here in Canada. It made a huge difference in power compared to the 36mm the the US got. 145 to 160hp depending on what you had done to the motor

Don't think there's anyone here that's swapped out carbs - that posts regularly anyway. There are several non-stock carb'd bikes at other sites, but it seems they usually go with smoothbores if they're at a mod level that can benefit from bigger carbs.

Don't think there's anyone here that's swapped out carbs - that posts regularly anyway. There are several non-stock carb'd bikes at other sites, but it seems they usually go with smoothbores if they're at a mod level that can benefit from bigger carbs.

If my memory serves me right Suzuki decided to name the carbs Slingshot for some reason. If you search for Bandit 400 in google pictures you will find a few with slingshot on the tank for someof the different markets. I think the 750 were still only 38mm. not the sewer pipe size 40mm lol

The term gets thrown around a bit. Commonly it's the limited edition homologation GSXR750R, aka "double-R" models. They had a lot of differences from the standard issue GSXR750. Most notable visually is solo seat tail and seat-of-the-pants is an extra 8-10 hp - which came from a different head and the Mikuni "Slingshot" semi-flatslide carbs. You'll see terms like Slingshot frame, swingarm, bodywork, etc... these are referring to the double-R's unique parts. Reality, only the carbs were real Slingshot. Slingshot is the name Mikuni gave the carbs with semi-spherical ridges on the slide faces smooth out air flow.

'88-'89 standard GSXR's got "Slingshot" style carbs, too, but they were only36mm, vs. the double-R's 40mm. In '90 the standard version got 38mm "Slingshot" carbs. These GSXR's will sometimes be referred to as Slingshot bikes, too... just less powerful than the double-R version.

Here's a '89 GSXR750R:

And a standard '89 GSXR750:

And a standard GSXR750 with a cowl over the passenger seat:(not to be confused with the solo only double-R)

The Slingshot style carbs have since been used on many other bikes, including GSXR400's, DR650's, RF900's, GSXR1100's - and the B12 as well as many non-Suzuki applications.

Been wanting to do this to my Bandit. Already makes 110HP with a stage II jet kit and bolt on.

Was thinking along the lines of a 1216 H/C kit, flat slides, cams, and clean up the heads - match the manifolds, and a 40 shot of nitrous. Could easily get the B12 to 200HP at the wheel. Good enough to nab some of the fastes Hayabusas... but on a bike that looks... IS... nearly ten years older.

I figured mayb $2500 to do this (me doing all labor), combined with the $2500 I gave for the bike... and I'd have one bad ass $5k bike.

B12mojo, you have only 110hp at the rear? With stage 2 and pipe, you should be closer to 120hp or more. Did you replace your midpipe? What size jets are you running? Back when I was only running stage 1 I dynoed at 114!

If it was me playing wtih a 1200 I would bolt on a set of 40mm carbs and cams from a 91 GSXR 1100 Install a good full pipe and I would have an easy 160 to 170 at the rear wheel. And I dout there would be any loss of midrange. These big engine will really breath if you let them. There's a reason why Suzuki bolted on 40mm carbs on all of our 1100's We love our horse power up here LMAO

You aren't gonna get 160-170 rwhp out of a B12 with 40's and a pipe.You're at least going to have to run GSXR cams and bump the compression up. Remember, the B12 is in a much milder state of tune than the GSXR1100 was.

When Dale Walker built his 1G B12, he got an honest 150 rwhp & 96 ft/lb of torque - with the stock carbs... he did have the following mods though: